J. A. Happ vs. Sam Leever — Career Comparison

On the career pitching numbers, Sam Leever posted a stronger line than J. A. Happ. Sam Leever posted stronger numbers in ERA (2.47 vs 4.13) and WHIP (1.141 vs 1.323). By the career numbers, Sam Leever had the better of this comparison — though ERA and WHIP alone don't account for era, park factors, or the defenses each pitcher worked behind.